505212043361 has 2 divisors, whose sum is σ = 505212043362. Its totient is φ = 505212043360.

The previous prime is 505212043331. The next prime is 505212043423. The reversal of 505212043361 is 163340212505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489328230400 + 15883812961 = 699520^2 + 126031^2 .

It is a cyclic number.

It is not a de Polignac number, because 505212043361 - 2¹⁰ = 505212042337 is a prime.

It is not a weakly prime, because it can be changed into another prime (505212043321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606021680 + 252606021681.

It is an arithmetic number, because the mean of its divisors is an integer number (252606021681).

Almost surely, 2^505212043361 is an apocalyptic number.

It is an amenable number.

505212043361 is a deficient number, since it is larger than the sum of its proper divisors (1).

505212043361 is an equidigital number, since it uses as much as digits as its factorization.

505212043361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 505212043361 its reverse (163340212505), we get a palindrome (668552255866).

The spelling of 505212043361 in words is "five hundred five billion, two hundred twelve million, forty-three thousand, three hundred sixty-one".